Angular 1 directive inside angular 2 application

Question

We created an Angular 2 application using this awesome Angular2 Seed which works very well. So the question that I have is, how can I upgrade this Angular 1 directive:

import template from './sbgOutlineButton.html!text';

var app = angular.module('sbgOutlineButton', []);

app.directive('sbgOutlineButton', function() {
    let link = function(scope, element, attributes) {
        if (attributes.icon === undefined) {
            let materialIcon = element.find('i.material-icons');
            materialIcon.addClass('hidden');
        }

    };

    return {
        link: link,
        restrict: 'E',
        template: template,
        replace: true,
        transclude: true,
        scope: { icon: '@' }
    };
});

export default app;

So that I can use it in the following Angular 2 component:

import { Component, OnInit, ChangeDetectionStrategy } from '@angular/core';
import { UpgradeAdapter } from '@angular/upgrade';

@Component({
    moduleId: module.id,
    selector: 'test-page',
    templateUrl: 'testpage.page.html',
    styleUrls: ['testpage.page.css']
})
export class TestPage implements OnInit {
    constructor() { }
    ngOnInit() { }
}

Do you guys maybe have any idea on how I will be able to accomplish this? Is it even possible? Because a lot of the other articles that I have found during my research suggests that your "base" application should be Angular 1...

Thanks in advance. Francois

Answer 1

How about converting your angular1 directive to angular2 directive?

NOTE: I don't know whether it will be useful or not but just have a look.

Look at the demo here : https://plnkr.co/edit/4Fhtm76iJl0aQmgjO7n0?p=preview

customeDirective.ts

import {Directive, Attribute,ElementRef,Renderer} from '@angular/core';

@Directive({
  selector: '[myAttr]'
})

export class myDir {
    constructor(@Attribute('icon') private icon,private el:ElementRef,private rd: Renderer){
    console.log(this.icon);
    if(this.icon===null){    //<--- you can play here as per your need.
      console.log('icon is undefined');
    }
    else{
            rd.setElementClass(el.nativeElement, 'myClass',true);
    }
    console.log(el.nativeElement); 
  }
}

AppComponent.ts

//our root app component
import {Component} from '@angular/core';
import {myDir} from 'src/customDirective';

@Component({
  selector: 'my-app',
  directives:[myDir],
  template: 
  `
  <style>
    .myClass{
      color:red;
      background:yellow;
    }
  </style>


    <div myAttr icon="myIcon">Angular2</div>  <!-- icon attribute is present so it will add the class -->

            <!-- OR USE BELOW HTML INSTEAD OF ABOVE -->

    <div myAttr>Angular2</div>                 <!-- icon attribute is not present so it gives null -->


  `
})
export class App {}

Answer 2

You need to upgrade to angular2 by using "@angular/upgrade": "2.0.0-rc.4", Guide

Because a lot of the other articles that I have found during my research suggests that your "base" application should be Angular 1...

It's if you have a already angular 1 project and you want to upgrade to one. Angular2 don't need angular1 as base

writing directive in angular2

import { Directive, ElementRef, Input } from '@angular/core';
@Directive({ selector: '[myHighlight]' })
export class HighlightDirective {
    constructor(el: ElementRef) {
       el.nativeElement.style.backgroundColor = 'yellow';
    }
}

My First Attribute Directive

Highlight me!

import { Component } from '@angular/core';
import { HighlightDirective } from './highlight.directive';
@Component({
  selector: 'my-app',
  templateUrl: 'app/app.component.html',
  directives: [HighlightDirective]
})
export class AppComponent { }

you Don't need to mix up angular1 into two..